/*
 * http://code.google.com/p/simple-lexing-parsers-4-scala/
 * 
 * Copyright (c) 2011, Sanjay Dasgupta
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * The name of the author may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package slp

trait JavaTokenParsers extends SimpleLexingParsers {

  lazy val ident = {
    if (ident$ eq null)
      lastCallForTokens()
    ident$
  }
  lazy val wholeNumber = {
    if (wholeNumber$ eq null)
      lastCallForTokens()
    wholeNumber$
  }
  lazy val decimalNumber = {
    if (decimalNumber$ eq null)
      lastCallForTokens()
    decimalNumber$
  }
  lazy val stringLiteral = {
    if (stringLiteral$ eq null)
      lastCallForTokens()
    stringLiteral$
  }
  lazy val floatingPointNumber = {
    if (floatingPointNumber$ eq null)
      lastCallForTokens()
    floatingPointNumber$
  }
  
  private var ident$: Parser[String] = null
  //  """[a-zA-Z_]\w*""".r
  private var wholeNumber$: Parser[String] = null
  //  """-?\d+""".r
  private var decimalNumber$: Parser[String] = null
  //  """(\d+(\.\d*)?|\d*\.\d+)""".r
  private var stringLiteral$: Parser[String] = null
  //  ("\""+"""([^"\p{Cntrl}\\]|\\[\\/bfnrt]|\\u[a-fA-F0-9]{4})*"""+"\"").r
  private var floatingPointNumber$: Parser[String] = null
  //  """-?(\d+(\.\d*)?|\d*\.\d+)([eE][+-]?\d+)?[fFdD]?""".r
  
  override def lastCallForTokens() {
    ident$ = "[a-zA-Z_][a-zA-Z_0-9]*".r
    wholeNumber$ = "\\-?[0-9]+".r
    decimalNumber$ = """([0-9]+(\.[0-9]*)?|[0-9]*\.[0-9]+)""".r
    stringLiteral$ = ("\\\"" + """([^"\000-\037\0177]|\\["'\\/bfnrt]|\\u[a-fA-F0-9]{4})*""" + "\\\"").r
    floatingPointNumber$ = """-?([0-9]+(\.[0-9]*)?|[0-9]*\.[0-9]+)([eE][+-]?[0-9]+)?[fFdD]?""".r
  }

}
